I don't collect luggage as a hobby as some seem to but we do have about 8-10 bags. It is nice to have the right bag for the journey at hand. Our "collection" consists of Samsonite, tumi, delsey etc. We seldom check luggage so most our odd assortment is based around smaller bags.
On a related topic I do have a major camera bag addiction when I go into battle I don't leave anything to chance. Depending on the job I may have any of several bags with me. I have one enormous bag for light stands and monolights that could hold a small adult if the compartment were removed. I have mostly Tarmac with a few others pieces. I need help